How are you trying to do this?
What created the files?
Are you actually logging into your server and what is the user name? (root is excluded from logging onto a share for security reasons.)
One thing to try is look at your shares from a terminal or PuTTY session. After logging in, type the following command:
ls /mnt/user -al
You should see your shares there. The owner of the shares should be 'nobody' and the group 'users'. Now get a list of the files inside one of your shares by hitting the 'up-arrow' key and using the 'right-arrow' and ''left-arrow' add the name (capitalization is IMPORTANT) of one of your shares as exampled in the following:
ls /mnt/user/Media -al
Again the owner of the shares should be 'nobody' and the group 'users'. If this is not the case, this is your source of your problem. Report back with the names and someone will be able to help you.
is this what you are talking about
login as: root
Last login: Sun Feb 21 21:38:35 2016 from 192.168.1.5
Linux 4.1.17-unRAID.
root@Tower:~# ls /mnt/user -al
total 7371854
drwxrwxrwx 1 nobody users 80 Mar 5 2012 %LocalAppData%/
drwxrwxrwx 1 nobody users 240 Sep 29 13:22 ./
drwxr-xr-x 10 root root 200 Feb 21 20:54 ../
drwxrwxrwx 1 nobody users 11072 Feb 21 21:39 Movies/
drwxrwxrwx 1 nobody users 2048 Nov 26 18:06 Music/
drwxrwxrwx 1 nobody users 5136 Feb 20 19:43 TV/
drwxrwxrwx 1 nobody users 48 Sep 23 02:07 Usenet/
drwxrwxrwx 1 nobody users 464 Feb 19 13:04 appdata/
-rw-rw-rw- 1 nobody users 32212254720 Feb 22 15:47 docker.img
drwxrwxrwx 1 nobody users 168 Sep 8 21:48 downloads/
drwxrwxrwx 1 nobody users 48 Dec 21 2011 lost+found/
drwxrwxrwx 1 nobody users 80 Nov 11 2011 sickbeard/
root@Tower:~#